CN111335846B

CN111335846B - Coal bed gas exploitation well-flushing equipment

Info

Publication number: CN111335846B
Application number: CN202010339936.2A
Authority: CN
Inventors: 罗林峰
Original assignee: Guiyang Xinrui Material Technology Co ltd
Current assignee: Guiyang Xinrui Material Technology Co ltd
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2022-10-25
Anticipated expiration: 2040-04-26
Also published as: CN111335846A

Abstract

The invention discloses a well washing device for coal bed gas exploitation, which comprises a power supply device, a control console, a pollution discharge pretreatment component, a stand and an underground device, wherein the power supply device and the control console are electrically connected and fixedly arranged on a bottom plate base, the control console is electrically driven to control the operation of the pollution discharge pretreatment component and the underground device, the pollution discharge pretreatment component is fixedly arranged on the top end face of the stand, and a rigid support ring base is fixedly welded on the bottom end face of the stand. The invention utilizes the flow stopping component to carry out circulation and closed control on the fluid pumped by the sewage pump, and in addition, the sewage pretreatment component in the invention smashes and dilutes the fluid to ensure the normal discharge of the fluid and avoid the condition that the fluid is blocked at the discharge port.

Description

Well washing equipment for coal bed gas exploitation

Technical Field

The invention relates to the field of well washing equipment for exploiting coal bed methane, in particular to well washing equipment for exploiting coal bed methane.

Background

The coal bed gas belongs to unconventional natural gas, the main component of the natural gas is methane, and usually, the coal bed gas is mainly adsorbed on the surfaces of coal matrix particles and partially dissociated in coal pore gaps or dissolved in coal bed water; the coal bed gas is mined in a drainage and gas production mode, water is discharged from the coal bed gas well through manual lifting, the pressure of a coal reservoir is reduced to be lower than the critical desorption pressure value of the coal bed gas, and accordingly methane in an adsorption state is desorbed to be in a free state and is transported to a wellhead.

However, in the process of exploiting coal bed gas at the present stage, coal bed gas in some blocks is particularly easy to produce coal dust, and the coal dust causes frequent blockage and pump blockage, which seriously affects the exploitation of coal bed gas.

Disclosure of Invention

Therefore, the invention provides a well washing device for coal bed methane exploitation to solve the problems in the background art.

In order to realize the purpose, the invention provides the following technical scheme: the utility model provides a coal bed gas is opened and is adopted well-flushing equipment, includes power supply unit, control cabinet, blowdown pretreatment module, pallet and downhole device, wherein, adopt electric connection and both all fixed settings on a bottom plate seat between power supply unit and the control cabinet, control cabinet electric drive control blowdown pretreatment module with the operation of downhole device, its characterized in that: the pollution discharge pretreatment assembly is fixedly installed on the top end face of the stand, a rigid support ring seat is fixedly welded on the bottom end face of the stand, the diameter of the outer ring of the rigid support ring seat is slightly larger than the diameter of a drilled well, so that the rigid support ring seat is supported and arranged on the inner wall of the drilled well, the underground device is installed in the middle of the bottom end face of the stand, and one end, far away from the stand, of the underground device extends to the bottom end of the drilled well;

the sewage disposal pretreatment component comprises an arched shell fixedly arranged on the stand, a stressed ring seat is fixedly welded on the top end face of the shell, a motor is installed on the left side of the shell, the driving end of the motor penetrates through and extends into the inner cavity of the shell, the motor drives and controls a smashing component located in the shell to rotate anticlockwise, the inner wall of the left side of the shell is connected with a baffle with a notch at the middle end, a sewage discharge pipe communicated with the inner cavity of the shell is installed on the right side of the shell, and a buffer pipe located at the bottom end of the stand is communicated with the bottom end of the inner cavity of the shell;

the smashing assembly comprises turnplates and rotating shafts, the turnplates are fixedly sleeved on the rotating shafts driven by a motor at equal intervals, a plurality of through holes are formed in the surfaces of the turnplates in a circumferential array mode, so that the turnplates are fixedly connected through locking bolts and form synchronous motion, two first blades with 70-degree radian are welded on the outer wall of each turnplate, a second blade is fixedly connected between the two first blades, and the radian of the second blade is smaller than that of the first blade; the outer wall of each rotary disc is also provided with a scraping brush so that the rotary discs can drive the scraping brushes to rotate to clean the inner wall of the shell;

the underground device comprises a protective pipe, a preposed pipe and a damping pipe head, wherein an annular bulge is arranged at the top end of the protective pipe and fixedly inserted between the rigid supporting ring seat and the buffer pipe, the bottom end of the inner wall of the protective pipe is arranged in an annular step mode so that the preposed pipe is in threaded connection with the inner wall of the bottom end of the protective pipe, a rubber sealing ring is arranged at the joint of the preposed pipe and the protective pipe, and the damping pipe head is fixedly sleeved at the bottom end of the preposed pipe;

the underground device further comprises a main core pipe and a suction assembly, the protective pipe, the preposed pipe and the shock absorption pipe head are communicated to form a fluid cavity, the main core pipe is installed in the fluid cavity, one end of the main core pipe is communicated with the buffer pipe in a sealing mode, and the other end of the main core pipe is communicated with the suction assembly installed at the bottom end of the shock absorption pipe head;

the suction assembly comprises a flow stopping assembly, a sewage pump and a connecting pipe communicated with the main core pipe, the bottom end of the connecting pipe is communicated with the flow stopping assembly, the bottom end of the flow stopping assembly is welded to the top end face of the supporting barrel in a sealing mode, a plurality of armed levers are welded to the outer cylindrical surface of the supporting barrel around the circumference array of the armed levers, each armed lever is connected with a supporting plate far away from one end of the supporting barrel through a bolt in an adaptive mode, so that the suction assembly is stably supported on the inner wall of the bottom end of a well, and the bottom end of the supporting barrel is communicated with the sewage end of the sewage pump through a switching pipe.

Preferably, the damping rubber ring sleeved on the main core tube is arranged in the middle of the inner cavity of the damping tube head, and the bottom end of the damping rubber ring is provided with a ring tube so that the main core tube can be arranged in the fluid cavity in a positive sliding manner.

Further, as preferred, the flow stopping assembly includes a guiding column, a plunger, a return spring, a cross-shaped inner panel and a flow stopping valve seat arranged in a cavity structure, the top end face of the flow stopping valve seat is raised to form a flow stopping ring communicated with the connecting pipe, so that the flow stopping valve seat is mounted at the bottom end of the connecting pipe through a locking ring, four notches are respectively formed at the upper end and the lower end of two sides of the inner wall of the flow stopping valve seat, so that the ends of the inner panels are respectively placed into the corresponding notches, so that the two inner panels are respectively mounted at the upper end and the lower end of the inner cavity of the flow stopping valve seat, the central position of the two inner panels is connected with the guiding column, the plunger is slidably sleeved on the outer cylindrical face of the guiding column, a plurality of small column heads are fixedly arranged at the edge of the top end face of the plunger, and the return spring is connected between the inner panel and the plunger.

Further, preferably, the diameter of the bottom end face of the plunger is equal to the inner diameter of the bottom end opening of the flow stop valve seat, and the elastic restoring force of the return spring is smaller than the thrust of the sucked fluid of the sewage pump to the plunger.

Further, preferably, the top end of the protective pipe is provided with two overflow holes which are positioned on different horizontal planes.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, under the action of no fluid pushing of the plunger of the flow stopping assembly, the pushing force of the reset spring pushes the plunger to perform circulation and closed control on the bottom port of the flow stopping valve seat, so that the condition that the interior of the whole equipment is damaged due to mechanical failure of a sewage pump is avoided, and meanwhile, the plunger can also enable fluid to be uniformly discharged upwards; in addition, the sewage disposal pretreatment assembly breaks and dilutes fluid to ensure normal discharge of the fluid and avoid the condition that the fluid is blocked at a discharge port, and the outer wall of each rotary disc in the sewage disposal pretreatment assembly is also provided with a scraping brush so that the rotary discs drive the scraping brushes to rotate to clean the inner wall of the shell, thereby reducing the cost required by subsequent equipment cleaning.

Drawings

FIG. 1 is a schematic structural diagram of a well washing device for exploiting coal bed methane;

FIG. 2 is a schematic diagram of a blowdown pretreatment assembly in a well washing apparatus for coal bed methane production;

FIG. 3 is a schematic diagram of a pumping assembly in a well washing apparatus for coal bed methane production;

FIG. 4 is a schematic view of a flow stopping assembly of a well washing apparatus for coal bed methane production;

FIG. 5 is a schematic diagram of a breaking assembly in a well washing apparatus for use in coal bed methane mining;

fig. 6 is an enlarged schematic view of a portion a of fig. 1.

In the figure: 1. a power supply device; 2. a console; 3. a blowdown pretreatment assembly; 31. a force ring seat; 32. a housing; 33. a blow-off pipe; 34. a buffer tube; 35. a motor; 36. a breaking-up component; 361. a first blade; 362. a second blade; 363. a locking bolt; 364. scraping and brushing; 365. a turntable; 37. a baffle plate; 4. a stand; 41. a rigid support ring mount; 5. an overflow aperture; 6. a main core tube; 7. a rubber seal ring; 8. a suction assembly; 81. a connecting pipe; 82. a support cylinder 83, a support plate; 84. a transfer tube; 85. a sewage pump; 86. a bolt; 87. an arm lever; 88. a flow stopping assembly; 881. a flow stopping ring; 882. a flow stop valve seat; 883. a pilot column; 884. a plunger; 885. a return spring; 886. an inner panel; 89. a locking ring; 9. a pre-pipe; 10. a protective tube; 11. a ring pipe; 12. a shock absorbing tube head; 13. shock attenuation rubber ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Example (b): referring to fig. 1-6, the present invention provides a technical solution: the utility model provides a coal bed gas is opened and is adopted well-flushing equipment, including power supply unit 1, control cabinet 2, blowdown pre-treatment component 3, pallet 4 and downhole device, wherein, adopt electric connection and both all fixed settings on a bottom plate seat between power supply unit 1 and the control cabinet 2, the operation of 2 electric drive control blowdown pre-treatment component 3 of control cabinet and downhole device, blowdown pre-treatment component 3 fixed mounting is on the top face of pallet 4, fixed welding has rigid support ring seat 41 on the bottom face of pallet 4, and rigid support ring seat 41's outer lane diameter slightly is greater than the well drilling bore, so that rigid support ring seat 41 supports and sets up on the well drilling inner wall, downhole device is installed to the intermediate position of pallet 4 bottom face, downhole device keeps away from the one end of pallet 4 and extends to the bottom of well drilling. Specifically, the power supply device 1 is a movable power supply, and an energy display meter is arranged on the surface of the power supply device; the rigid support ring seat 41 can be embedded in and support the well drilling head, and the situation that the well drilling head collapses due to heavy pressure is avoided.

Blowdown preliminary treatment subassembly 3 is including fixed setting up the arch shell 32 on stand 4, fixed welding has atress ring seat 31 on the top face of shell 32, motor 35 is installed in the left side of shell 32, the drive end of motor 35 pierces through and stretches into the inner chamber of shell 32, and motor 35 drive control is located smashing subassembly 36 and carrying out anticlockwise rotation in shell 32, the left side inner wall connection of shell 32 has the baffle 37 that the middle part is equipped with the breach, the blow off pipe 33 with the inner chamber intercommunication of shell 32 is installed on the right side of shell 32, the inner chamber bottom intercommunication of shell 32 has the buffer tube 34 that is located stand 4 bottom. Specifically, the drain 33 is located at the lower right side of the breaking assembly 36, so that the breaking assembly 36 rotating counterclockwise can flow the fluid toward the drain 33.

The smashing component 36 comprises rotating discs 365 and a rotating shaft, the rotating discs 365 are fixedly sleeved on the rotating shaft driven by the motor 35 at equal intervals, a plurality of through holes are formed in the surface of each rotating disc 365 in a circumferential array mode, so that the rotating discs 365 are fixedly connected through a locking bolt 363 and form synchronous motion, two first blades 361 with radian set to be 70 degrees are welded on the outer wall of each rotating disc 365, a second blade 362 is fixedly connected between the two first blades 361, and the radian of the second blade 362 is smaller than that of the first blades 361, so that enough flowable space is reserved in the shell 32, the dilution effect is enhanced, meanwhile, the flowing direction of fluid can be driven, so that the fluid can be smoothly discharged from the sewage discharge pipe 33, and the working efficiency is improved;

each turntable 365 also has a wiper 364 mounted on an outer wall thereof so that the turntable 365 rotates the wiper 364 to clean the inner wall of the housing 32.

The underground device comprises a protective pipe 10, a preposed pipe 9 and a damping pipe head 12, wherein the top end of the protective pipe 10 is provided with an annular bulge, the bulge is fixedly inserted between a rigid supporting ring seat 41 and a buffer pipe 34, the bottom end of the inner wall of the protective pipe 10 is arranged in an annular step mode, so that the preposed pipe 9 is in threaded connection with the inner wall of the bottom end of the protective pipe 10, a rubber sealing ring 7 is arranged at the joint of the preposed pipe 9 and the protective pipe 10, and the damping pipe head 12 is fixedly sleeved at the bottom end of the preposed pipe 9.

The underground device also comprises a main core tube 6 and a suction assembly, wherein the protective tube 10, the preposed tube 9 and the shock absorption tube head 12 are communicated to form a fluid cavity, the main core tube 6 is arranged in the fluid cavity, one end of the main core tube 6 is communicated with the buffer tube 34 in a sealing way, and the other end of the main core tube 6 is communicated with the suction assembly 8 arranged at the bottom end of the shock absorption tube head 12. Specifically, a gap is reserved between the fluid cavity and the main core pipe 6, so that the buoyancy support of the fluid is relieved; the outer wall of the main core tube 6 is sleeved with a sponge sleeve for protection.

Suction assembly 8 includes only flowing subassembly 88, dredge pump 85 and the connecting pipe 81 that is linked together with main core pipe 6, the bottom intercommunication of connecting pipe 81 has only flowing subassembly 88, only flowing subassembly 88's bottom sealing weld is on supporting cylinder 82 top face, it has a plurality of armed levers 87 to wind its circumference array welding on supporting cylinder 82's the outer cylindrical surface, and the one end that supporting cylinder 82 was kept away from to every armed lever 87 all has backup pad 83 through bolt 86 adapter coupling, so that suction assembly steadily supports on the inner wall of well drilling bottom, the bottom of supporting cylinder 82 is through the blowdown end of adapter pipe 84 intercommunication dredge pump 85.

In this embodiment, a damping rubber ring 13 sleeved on the main core tube 6 is disposed in the middle of the inner cavity of the damping tube head 12, and an annular tube 11 is disposed at the bottom end of the damping rubber ring 13, so that the main core tube 6 is slidably disposed in the fluid cavity. Specifically, the damping rubber ring 13 can reduce the shock during the fluid suction, so that the damping tube head 12 is shaken, and meanwhile, the bottom end of the damping tube head 12 is further provided with a pore channel communicated with the inner cavity of the damping tube head, so that the fluid can be conveniently infiltrated into the fluid cavity, and the pressure discharge effect can be realized.

In this embodiment, the flow stopping assembly 88 includes a guiding column 883, a plunger 884, a return spring 885, a cross-shaped inner panel 886 and a flow stopping valve seat 882 configured as a cavity structure, a flow stopping ring 881 communicated with the connecting pipe 81 is formed by protruding from a top end surface of the flow stopping valve seat 882, so that the flow stopping valve seat 882 is installed at a bottom end of the connecting pipe 81 through a locking ring 89, four notches are respectively opened at upper and lower ends of two sides of an inner wall of the flow stopping valve seat 882, so that ends of the two inner panels 886 are respectively placed into the corresponding notches, so that the two inner panels 886 are respectively installed at the upper and lower ends of an inner cavity of the flow stopping valve seat 882, the guiding column 883 is connected to a center position of the two inner panels 886, the plunger 884 is slidably sleeved on an outer cylindrical surface of the guiding column 883, and a plurality of small column heads are fixedly arranged at an edge of a top end surface of the plunger 884, thereby preventing the top end port of the flow stopping valve seat 882 from being closed due to an excessive force applied to the plunger 884, and the return spring 885 is connected between the inner panel 886 located above the plunger 884.

In this embodiment, the diameter of the bottom end surface of the plunger 884 is equal to the inner diameter of the bottom port of the check valve seat 882, and the elastic restoring force of the return spring 885 is smaller than the pushing force of the intake fluid of the dredge pump 85 on the plunger 884. So that the plunger 884 pushes the plunger 884 to block and seal the bottom port of the check valve seat 882 under the action of no fluid pushing by the reset spring 885, thereby avoiding the situation that the dredge pump 85 is damaged inside the whole equipment due to mechanical failure.

In this embodiment, the top end of the protection tube 10 is provided with two overflow holes 5 located on different horizontal planes, so that the fluid infiltrated by the fluid cavity overflows from the overflow holes 5.

In specific implementation, the control console 2 controls power supply, the sewage pump 85 pumps fluid in a well, the flow stopping assembly 88 performs circulation and closed control on the fluid, meanwhile, the damping rubber ring 13 in the damping pipe head 12 can reduce the impact generated during fluid suction, so that the fluid shakes, when the fluid passes through the sewage pretreatment assembly 3, the breaking assembly 36 in the sewage pretreatment assembly 3 breaks and dilutes the fluid to ensure normal discharge of the fluid and avoid the blockage of the fluid at a discharge port, and meanwhile, the outer wall of each rotating disc 365 in the sewage pretreatment assembly 3 is also provided with the scraping brush 364, so that the rotating disc 365 drives the scraping brush 364 to rotate to clean the inner wall of the shell 32, and the cost required by subsequent equipment cleaning is reduced; in addition, the overflow hole 5 is formed in the protective pipe 10, so that buoyancy support of underground fluid to the underground device is reduced, and the working efficiency is effectively improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a coal bed gas is opened and is adopted well-flushing equipment, includes power supply unit (1), control cabinet (2), blowdown pretreatment component (3), pallet (4) and downhole device, wherein, adopt electric connection and both all fixed settings on a bottom plate seat between power supply unit (1) and control cabinet (2), control cabinet (2) electric drive control blowdown pretreatment component (3) with the operation of downhole device, its characterized in that: the pollution discharge pretreatment assembly (3) is fixedly installed on the top end face of the stand (4), a rigid support ring seat (41) is fixedly welded on the bottom end face of the stand (4), the diameter of the outer ring of the rigid support ring seat (41) is slightly larger than the caliber of a drilling well, so that the rigid support ring seat (41) is supported and arranged on the inner wall of the drilling well, the underground device is installed in the middle of the bottom end face of the stand (4), and one end, far away from the stand (4), of the underground device extends to the bottom end of the drilling well;

the pollution discharge pretreatment component (3) comprises an arched shell (32) fixedly arranged on the stand (4), a stress ring seat (31) is fixedly welded on the top end face of the shell (32), a motor (35) is installed on the left side of the shell (32), the driving end of the motor (35) penetrates through and extends into the inner cavity of the shell (32), the motor (35) drives and controls a crushing component (36) positioned in the shell (32) to rotate anticlockwise, the inner wall of the left side of the shell (32) is connected with a baffle (37) with a notch at the middle end, a pollution discharge pipe (33) communicated with the inner cavity of the shell (32) is installed on the right side of the shell (32), and the bottom end of the inner cavity of the shell (32) is communicated with a buffer pipe (34) positioned at the bottom end of the stand (4);

the smashing component (36) comprises rotating discs (365) and rotating shafts, the rotating discs (365) are fixedly sleeved on the rotating shafts driven by a motor (35) at equal intervals, a plurality of through holes are formed in the surface of each rotating disc (365) in a circumferential array mode, so that the rotating discs (365) are fixedly connected through locking bolts (363) and synchronously move, two first blades (361) with radian set to be 70 degrees are welded on the outer wall of each rotating disc (365), a second blade (362) is fixedly connected between the two first blades (361), and the radian of the second blade (362) is smaller than that of each first blade (361); the outer wall of each rotating disc (365) is also provided with a scraping brush (364) so that the rotating discs (365) drive the scraping brushes (364) to rotate to clean the inner wall of the shell (32);

the underground device comprises a protection pipe (10), a preposed pipe (9) and a damping pipe head (12), wherein an annular bulge is arranged at the top end of the protection pipe (10) and fixedly inserted between a rigid supporting ring seat (41) and a buffer pipe (34), the bottom end of the inner wall of the protection pipe (10) is in an annular step type, so that the preposed pipe (9) is in threaded connection with the inner wall of the bottom end of the protection pipe (10), a rubber sealing ring (7) is arranged at the joint of the preposed pipe (9) and the protection pipe (10), and the damping pipe head (12) is fixedly sleeved at the bottom end of the preposed pipe (9);

the underground device further comprises a main core tube (6) and a suction assembly, wherein the protective tube (10), the preposed tube (9) and the shock absorption tube head (12) are communicated to form a fluid cavity, the main core tube (6) is installed in the fluid cavity, one end of the main core tube (6) is communicated with the buffer tube (34) in a sealing mode, and the other end of the main core tube (6) is communicated with the suction assembly (8) installed at the bottom end of the shock absorption tube head (12);

suction assembly (8) including ending flow components (88), dredge pump (85) and with connecting pipe (81) that main heart pipe (6) are linked together, the bottom intercommunication of connecting pipe (81) has end flow components (88), the bottom sealing weld of ending flow components (88) is on supporting barrel (82) top face, it has a plurality of armed levers (87) to wind its circumference array welding on the outer face of cylinder of supporting barrel (82), and every the one end that supporting barrel (82) were kept away from in armed lever (87) all has backup pad (83) through bolt (86) adapter coupling, so that suction assembly steadily supports on the inner wall of well drilling bottom, the bottom of supporting barrel (82) is through adapter tube (84) intercommunication the blowdown end of dredge pump (85).

2. The coal bed methane exploitation well washing equipment according to claim 1, wherein: the damping tube head is characterized in that a damping rubber ring (13) sleeved on the main core tube (6) is arranged in the middle of the inner cavity of the damping tube head (12), and an annular tube (11) is arranged at the bottom end of the damping rubber ring (13) so that the main core tube (6) can be arranged in the fluid cavity in a guiding and sliding manner.

3. A coal bed methane exploitation well flushing apparatus according to claim 2, wherein: flow stopping subassembly (88) including leading positive post (883), plunger (884), reset spring (885), "ten" style of calligraphy interior panel (886) and set up to the only flow disk seat (882) of cavity structure, protruding formation on the top face of only flow disk seat (882) with only flow ring (881) that connecting pipe (81) are linked together to be convenient for only flow disk seat (882) are installed through locking circle (89) the bottom of connecting pipe (81), four notches have been seted up respectively to the upper and lower end of only flow disk seat (882) inner wall both sides, so that two the end of interior panel (886) is put into respectively and is corresponded the notch makes two install upper and lower extreme at only flow disk seat (882) inner chamber respectively interior panel (886) central point of interior panel (886) is connected with leads positive post (883), it is equipped with plunger (884) to lead on the outer face of positive post (883) sliding sleeve, and the fixed edge that is provided with a plurality of small-size plunger (884), be located between plunger (884) the post head of plunger (885) and reset spring (885) are connected with.

4. A coal bed methane exploitation well washing apparatus according to claim 3, wherein: the diameter of the bottom end face of the plunger (884) is equal to the inner diameter of the bottom port of the flow stopping valve seat (882); the elastic restoring force of the return spring (885) is less than the thrust of the intake fluid of the dredge pump (85) to the plunger (884).

5. The coal bed methane exploitation well washing equipment according to claim 1, wherein: the top end of the protective pipe (10) is provided with two overflow holes (5) which are positioned on different horizontal planes.